Re: A rant
In the UK there are basically three types of pipe connectors: push fit, compression and solvent weld.
The first two are self explanatory and can be easily taken apart. They are fine providing that sufficient supporting brackets are put in place, but tend to be used by DIYers.
The latter involve using glue, and will not come apart ever after about 5 minutes. These also require pipes made from a different type of plastic, which is slightly different in diameter to push fit pipes.
I have never heard of anyone using tape to seal push fit fittings, and only a moron would consider it as appropriate. One can use tape to help minor leaks on compression fittings, to help where the rubber washer has a minor tear, but even this isn't really ideal.
Who commissioned this halfwit to do the work? Is he insured, because most proper tradesmen (in the UK)take out indemnity policies to cover them when things go wrong? If the landlady hired the imbecile, then I trust that you will let her know about the situation, since apart from anything else, you don't want her to sue you for damages to her apartment.